Preheat oven to 375°F.
Unroll crescent rolls and pat into a rimmed 10x15-inch baking sheet, being sure to seal perforations. Bake for 10 minutes.
In a medium bowl, combine both cans of Lucky Leaf Lite Apple Pie Filling and apple pie spice. Evenly spread apple mixture over partially baked crust.
In a small bowl, combine graham cracker crumbs, Splenda, and margarine. Mix gently with a pastry cutter or 2 forks to form soft crumbs.
Sprinkle crumb mixture evenly over apple pie filling mixture. Continue baking for 20 minutes. Place baking sheet on a wire rack and let set for 5 minutes. Cut into 12 servings.